"that's just a modern-day version of genocide, without the massacres." Seems you don't know what genocide means. This is a typical tactic used by people with no valid arguement, throwing aweful words around to make it seem like they are coming from a position of strength. Another tactic is called the "red herring" which that statement also smells of.
Nevertheless, if a non-FN marries a FN and they have children and they marry non-first nations etc. eventually they will not look like FN. They likely will not be able to speak FN either. So is that genocide in your eyes? The mixing of races has been going on for thousands of years which is as it should be. To try to stop that is itself racist.
Actually the closing of small communities did happen in Newfoundland and for the better. It is nothing new.